IT986281B - Sistema di commutazione telefonica particolarmente per genralini privati - Google Patents

Sistema di commutazione telefonica particolarmente per genralini privati

Info

Publication number: IT986281B
Authority: IT; Italy
Prior art keywords: genralini; private; switching system; telephone switching; system particularly
Prior art date: 1972-05-03

Application number

IT68224/73A

Other languages

English (en)

Original Assignee

Western Electric Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1972-05-03

Filing date

1973-05-02

Publication date

1975-01-20

1973-05-02 Application filed by Western Electric Co filed Critical Western Electric Co

1975-01-20 Application granted granted Critical

1975-01-20 Publication of IT986281B publication Critical patent/IT986281B/it

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
- H04Q3/625—Arrangements in the private branch exchange

Landscapes

Physics & Mathematics (AREA)
Astronomy & Astrophysics (AREA)
General Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Exchange Systems With Centralized Control (AREA)
Sub-Exchange Stations And Push- Button Telephones (AREA)
Interface Circuits In Exchanges (AREA)
Telephonic Communication Services (AREA)

IT68224/73A 1972-05-03 1973-05-02 Sistema di commutazione telefonica particolarmente per genralini privati IT986281B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US24979972A	1972-05-03	1972-05-03

Publications (1)

Publication Number	Publication Date
IT986281B true IT986281B (it)	1975-01-20

Family

ID=22945045

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT68224/73A IT986281B (it)	1972-05-03	1973-05-02	Sistema di commutazione telefonica particolarmente per genralini privati

Country Status (10)

Country	Link
US (1)	US3746797A (it)
JP (1)	JPS5333207B2 (it)
BE (1)	BE798984A (it)
CA (1)	CA998150A (it)
DE (1)	DE2321947A1 (it)
ES (1)	ES414271A1 (it)
FR (1)	FR2183172B1 (it)
GB (1)	GB1426919A (it)
IT (1)	IT986281B (it)
SE (1)	SE395997B (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4039758A (en) *	1973-05-22	1977-08-02	Hitachi, Ltd.	Line identifying system of common control type automatic exchange
JPS5068004A (it) *	1973-10-16	1975-06-07
US3903374A (en) *	1974-01-09	1975-09-02	Stromberg Carlson Corp	Control system for electronic PABX switching matrix
US3967073A (en) *	1975-01-09	1976-06-29	Bell Telephone Laboratories, Incorporated	PBX automatic number identification system
US4286118A (en) *	1979-07-02	1981-08-25	Solid State Systems, Inc.	Data distribution system for private automatic branch exchange
ZA838877B (en) *	1982-12-02	1984-09-26	Gen Electric	Telecommunication exchanges
JPS6253061A (ja) *	1985-09-02	1987-03-07	Nec Corp	不正アクセス防止方法

1972
- 1972-05-03 US US00249799A patent/US3746797A/en not_active Expired - Lifetime
- 1972-12-14 CA CA158,830A patent/CA998150A/en not_active Expired
1973
- 1973-04-24 SE SE7305736A patent/SE395997B/xx unknown
- 1973-05-01 GB GB2060273A patent/GB1426919A/en not_active Expired
- 1973-05-02 FR FR7315739A patent/FR2183172B1/fr not_active Expired
- 1973-05-02 JP JP4860073A patent/JPS5333207B2/ja not_active Expired
- 1973-05-02 ES ES0414271A patent/ES414271A1/es not_active Expired
- 1973-05-02 IT IT68224/73A patent/IT986281B/it active
- 1973-05-02 BE BE130646A patent/BE798984A/xx unknown
- 1973-05-02 DE DE2321947A patent/DE2321947A1/de active Pending

Also Published As

Publication number	Publication date
ES414271A1 (es)	1976-05-01
CA998150A (en)	1976-10-05
DE2321947A1 (de)	1973-11-15
JPS5333207B2 (it)	1978-09-13
JPS4956513A (it)	1974-06-01
SE395997B (sv)	1977-08-29
BE798984A (fr)	1973-08-31
US3746797A (en)	1973-07-17
GB1426919A (en)	1976-03-03
FR2183172B1 (it)	1982-07-02
FR2183172A1 (it)	1973-12-14

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